Details

Autor(en) / Beteiligte

• Bonilla, Cesar
• Sokolowska, Dorota
• Darvishi, Neda
• Diaz-Cruz, J Lorenzo
• Krawczyk, Maria

Titel

IDMS: inert dark matter model with a complex singlet

Ist Teil von

• Journal of physics. G, Nuclear and particle physics, 2016-06, Vol.43 (6), p.65001-65039

Ort / Verlag

IOP Publishing

Erscheinungsjahr

2016

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We study an extension of the inert doublet model (IDM) that includes an extra complex singlet of the scalars fields, which we call the IDMS. In this model there are three Higgs particles, among them a SM-like Higgs particle, and the lightest neutral scalar, from the inert sector, remains a viable dark matter (DM) candidate. We assume a non-zero complex vacuum expectation value for the singlet, so that the visible sector can introduce extra sources of CP violation. We construct the scalar potential of IDMS, assuming an exact Z2 symmetry, with the new singlet being Z2-even, as well as a softly broken U(1) symmetry, which allows a reduced number of free parameters in the potential. In this paper we explore the foundations of the model, in particular the masses and interactions of scalar particles for a few benchmark scenarios. Constraints from collider physics, in particular from the Higgs signal observed at the Large Hadron Collider with M h 125 GeV , as well as constraints from the DM experiments, such as relic density measurements and direct detection limits, are included in the analysis. We observe significant differences with respect to the IDM in relic density values from additional annihilation channels, interference and resonance effects due to the extended Higgs sector.